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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-03 22:35:20 +0100 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-04 14:23:40 +0100 |
commit | 53540098b23c3884b4a0b4f220b9d977bc496af3 (patch) | |
tree | fe86061c4772efaa92fbe68920f803ae4280b2d0 /drivers/scsi/scsi_lib.c | |
parent | 9b27516fcd7ab7dc416edf418446c24c61729938 (diff) | |
download | linux-53540098b23c3884b4a0b4f220b9d977bc496af3.tar.gz linux-53540098b23c3884b4a0b4f220b9d977bc496af3.tar.bz2 linux-53540098b23c3884b4a0b4f220b9d977bc496af3.zip |
ACPI / glue: Add .match() callback to struct acpi_bus_type
USB uses the .find_bridge() callback from struct acpi_bus_type
incorrectly, because as a result of the way it is used by USB every
device in the system that doesn't have a bus type or parent is
passed to usb_acpi_find_device() for inspection.
What USB actually needs, though, is to call usb_acpi_find_device()
for USB ports that don't have a bus type defined, but have
usb_port_device_type as their device type, as well as for USB
devices.
To fix that replace the struct bus_type pointer in struct
acpi_bus_type used for matching devices to specific subsystems
with a .match() callback to be used for this purpose and update
the users of struct acpi_bus_type, including USB, accordingly.
Define the .match() callback routine for USB, usb_acpi_bus_match(),
in such a way that it will cover both USB devices and USB ports
and remove the now redundant .find_bridge() callback pointer from
usb_acpi_bus.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r-- | drivers/scsi/scsi_lib.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 765398c063c7..c31187d79343 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -71,9 +71,14 @@ struct kmem_cache *scsi_sdb_cache; #ifdef CONFIG_ACPI #include <acpi/acpi_bus.h> +static bool acpi_scsi_bus_match(struct device *dev) +{ + return dev->bus == &scsi_bus_type; +} + int scsi_register_acpi_bus_type(struct acpi_bus_type *bus) { - bus->bus = &scsi_bus_type; + bus->match = acpi_scsi_bus_match; return register_acpi_bus_type(bus); } EXPORT_SYMBOL_GPL(scsi_register_acpi_bus_type); |